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能够使方程左右两边的值相等的未知数的值叫方程的解,即(1)将方程的解代入方程,能使方程左右两边的值相等;(2)若能使方程左右两边的值相等的未知数的值是方程的解.
(2) If the left and right sides of the equation can equal the value of the left and right sides of the equation, then the value of the left and right sides of the equation is equal The value of the unknown is the solution to the equation.